Commit graph

198 commits

Author SHA1 Message Date
Guus Sliepen
1f00111e94 Fix a few small memory leaks. 2011-12-26 23:11:27 +01:00
Guus Sliepen
178e52f76e Allow linking with multiple device drivers.
Apart from the platform specific tun/tap driver, link with the dummy and
raw_socket devices, and optionally with support for UML and VDE devices.
At runtime, the DeviceType option can be used to select which driver to
use.
2011-12-04 01:20:59 +01:00
Guus Sliepen
ddea7a23a6 Return false instead of void when there is an error. 2011-08-30 20:49:48 +02:00
Guus Sliepen
e838289683 Prevent read_rsa_public_key() from returning an uninitialized RSA structure.
In case the config file could not be opened a new but unitialized RSA structure
would be returned, causing a segmentation fault later on. This would only
happen in the case that the config file could be opened before, but not when
read_rsa_public_key() was called. This situation could occur when the --user
option was used, and the config files were not readable by the specified user.
2011-08-30 20:04:18 +02:00
Guus Sliepen
cff27a258f Use ECDSA to sign ECDH key exchange for UDP session keys.
The ECDSA public keys will also be included in the ANS_KEY requests,
but are only used when no ECDSA public key is known yet.
2011-07-16 20:21:44 +02:00
Guus Sliepen
bbeab00f46 Require ExperimentalProtocol = yes for new features, update documentation. 2011-07-11 21:54:01 +02:00
Guus Sliepen
210b5ceeee Read ECDSA keys. 2011-07-07 22:28:25 +02:00
Guus Sliepen
9708bbfa8e Add a minor number to the protocol version. 2011-07-05 21:19:48 +02:00
Guus Sliepen
6d08eb1614 Fix sparse warnings and add an extra sprinkling of const.
This is more or less the equivalent of Sven-Haegar Koch's fixes in the 1.1
branch.
2011-05-28 23:36:52 +02:00
Sven-Haegar Koch
434e57ae5e sparse fixup: warning: Using plain integer as NULL pointer 2011-05-28 15:24:39 +02:00
Sven-Haegar Koch
f4010694b3 sparse fixup: warning: non-ANSI function declaration of function '...' 2011-05-28 15:24:39 +02:00
Sven-Haegar Koch
d772289f6d sparse fixup: warning: symbol '...' was not declared. Should it be static? 2011-05-28 15:24:39 +02:00
Sven-Haegar Koch
02e32cf61e sparse fixup: error: too many arguments for function send_key_changed 2011-05-28 15:24:39 +02:00
Guus Sliepen
3f59a26d80 Do not try to dereference myself->connection->config_tree.
This was a bug introduced due to an incomplete merge (commit
ff71f28902).
2010-11-19 12:26:20 +00:00
Guus Sliepen
886a6f61a1 Merge branch 'master' into 1.1
Conflicts:
	src/net_packet.c
	src/openssl/rsagen.h
	src/protocol_auth.c
	src/protocol_key.c
2010-11-19 12:22:48 +00:00
Guus Sliepen
d91903ef3c Attribution for Brandon Black. 2010-11-16 17:28:41 +01:00
Brandon L Black
23acc19bc0 Configurable ReplayWindow size, zero disables 2010-11-13 21:25:46 +01:00
Brandon L Black
8dfe1b374e Configurable SO_RCVBUF/SO_SNDBUF for the UDP socket 2010-11-13 21:25:44 +01:00
Guus Sliepen
a22041922f Merge branch 'master' into 1.1
Conflicts:
	doc/tincd.8.in
	lib/pidfile.c
	src/graph.c
	src/net.c
	src/net.h
	src/net_packet.c
	src/net_setup.c
	src/net_socket.c
	src/netutl.c
	src/node.c
	src/node.h
	src/protocol_auth.c
	src/protocol_key.c
	src/tincd.c
2010-11-12 16:15:29 +01:00
Guus Sliepen
667b1bac77 Remove duplicate command-line option parsing.
Also fix parsing of command-line host configuration options for the local node.
2010-10-22 13:06:06 +02:00
Guus Sliepen
ff71f28902 Merge local host configuration with server configuration.
With some exceptions, tinc only accepted host configuration options for the
local node from the corresponding host configuration file. Although this is
documented, many people expect that they can also put those options in
tinc.conf. Tinc now internally merges the contents of both tinc.conf and the
local host configuration file.
2010-10-22 12:47:12 +02:00
Guus Sliepen
ee427cac0d Do not try to free NULL pointers. 2010-04-30 23:13:02 +02:00
Guus Sliepen
79e46d08a4 Merge branch 'master' into 1.1
Conflicts:
	NEWS
	README
	configure.in
	src/net.c
	src/net.h
2010-04-17 12:21:53 +02:00
Guus Sliepen
32f5524c4b Fix reloading Subnets when StrictSubnets is set. 2010-04-11 04:35:16 +02:00
Guus Sliepen
9f53ab209d Reload Subnets when getting a HUP signal and StrictSubnets is used. 2010-04-11 00:50:42 +02:00
Guus Sliepen
f75e71bc69 Convert Port to numeric form before sending it to other nodes.
If one uses a symbolic name for the Port option, tinc will send that name
literally to other nodes.  However, it is not guaranteed that all nodes have
the same contents in /etc/services, or have such a file at all.
2010-04-03 09:46:45 +01:00
Sven-Haegar Koch
0310deb225 Demote all LOG_EMERG to LOG_ERR, spamming all xterms is bad. 2010-03-31 05:06:33 +02:00
Sven-Haegar Koch
ffa1dc73dc Fixed 1.0 miss-merges 2010-03-31 05:01:39 +02:00
Sven-Haegar Koch
103543aa2c Merge branch 'master' into 1.1
Conflicts:
	NEWS
	README
	configure.in
	have.h
	src/conf.c
	src/conf.h
	src/net.c
	src/net_packet.c
	src/protocol_key.c
	src/protocol_subnet.c
	src/route.c
	src/tincd.c
2010-03-26 16:51:03 +01:00
Guus Sliepen
8ae54dc7c7 Fixes for the Forwarding option. 2010-03-02 23:27:50 +01:00
Guus Sliepen
3e4829e78a Add the DirectOnly option.
When this option is enabled, packets that cannot be sent directly to the destination node,
but which would have to be forwarded by an intermediate node, are dropped instead.
When combined with the IndirectData option,
packets for nodes for which we do not have a meta connection with are also dropped.
2010-03-02 22:55:24 +01:00
Guus Sliepen
95a6974de1 Add the Forwarding option.
This determines if and how incoming packets that are not meant for the local
node are forwarded.  It can either be off, internal (tinc forwards them itself,
as in previous versions), or kernel (packets are always sent to the TUN/TAP
device, letting the kernel sort them out).
2010-03-02 22:34:26 +01:00
Guus Sliepen
5038964032 Add the StrictSubnets option.
When this option is enabled, tinc will not accept dynamic updates of Subnets
from other nodes, but will only use Subnets read from local host config files
to build its routing table.
2010-03-02 00:18:44 +01:00
Guus Sliepen
9fed0ec34b Preload all Subnets in TunnelServer mode.
This simplifies the logic in protocol_subnet.c.
2010-03-01 23:44:56 +01:00
Guus Sliepen
40d91ff619 Update copyright notices. 2010-02-02 22:49:21 +01:00
Guus Sliepen
b455111184 Make MSS clamping configurable, but enabled by default.
It can either be set globally in tinc.conf, or per-node in host config files.
2010-01-16 20:16:33 +01:00
Guus Sliepen
e4812ba9cc Allow Port and PMTUDiscovery options in tinc.conf, always enable PMTUDiscovery by default. 2009-12-24 12:42:21 +01:00
Guus Sliepen
7203d5fb07 Use xstrdup() instead of xasprintf() to copy static strings. 2009-12-23 19:51:55 +01:00
Guus Sliepen
37ccb325af Don't enable device events when there is no valid filedescriptor. 2009-11-04 16:18:08 +01:00
Guus Sliepen
108b238915 Merge branch 'master' into 1.1
Conflicts:
	NEWS
	README
	configure.in
	doc/tinc.texi
	doc/tincd.8.in
	src/Makefile.am
	src/connection.c
	src/edge.c
	src/meta.c
	src/net.c
	src/net.h
	src/net_packet.c
	src/net_setup.c
	src/net_socket.c
	src/node.c
	src/openssl/rsagen.h
	src/protocol_auth.c
	src/protocol_edge.c
	src/subnet.c
2009-11-02 14:24:27 +01:00
Guus Sliepen
35af4051c3 Fix a possible crash when sending the HUP signal.
When the HUP signal is sent while some outgoing connections have not been made
yet, or are being retried, a NULL pointer could be dereferenced resulting in
tinc crashing. We fix this by more careful handling of outgoing_ts, and by
deleting all connections that have not been fully activated yet at the HUP
signal is received.
2009-10-20 22:14:47 +02:00
Guus Sliepen
a4f132770d Revert "Raise default crypto algorithms to AES256 and SHA256."
Although it would be better to have the new defaults, only the most recent
releases of most of the platforms supported by tinc come with a version of
OpenSSL that supports SHA256. To ensure people can compile tinc and that nodes
can interact with each other, we revert the default back to Blowfish and SHA1.

This reverts commit 4bb3793e38.
2009-10-11 13:56:04 +02:00
Guus Sliepen
7ea85043ac Merge branch 'master' into 1.1
Conflicts:
	NEWS
	configure.in
	lib/Makefile.am
	lib/pidfile.c
	lib/pidfile.h
	lib/utils.c
	po/POTFILES.in
	po/nl.po
	src/Makefile.am
	src/bsd/device.c
	src/conf.c
	src/connection.c
	src/cygwin/device.c
	src/edge.c
	src/event.c
	src/graph.c
	src/linux/device.c
	src/meta.c
	src/mingw/device.c
	src/net.c
	src/net_packet.c
	src/net_setup.c
	src/net_socket.c
	src/netutl.c
	src/node.c
	src/process.c
	src/protocol.c
	src/protocol_auth.c
	src/protocol_edge.c
	src/protocol_key.c
	src/protocol_misc.c
	src/protocol_subnet.c
	src/raw_socket/device.c
	src/route.c
	src/solaris/device.c
	src/subnet.c
	src/tincd.c
	src/uml_socket/device.c
2009-09-29 14:55:29 +02:00
Guus Sliepen
46e481dc94 Add more authors to the copyright headers.
Git's log and blame tools were used to find out which files had significant
contributions from authors who sent in patches that were applied before we used
git.
2009-09-25 21:14:56 +02:00
Guus Sliepen
4c85542894 Drop support for localisation.
Localised messages don't make much sense for a daemon, and there is only the
Dutch translation which costs time to maintain.
2009-09-25 00:54:07 +02:00
Guus Sliepen
a227843b73 Remove checkpoint tracing.
This feature is not necessary anymore since we have tools like valgrind today
that can catch stack overflow errors before they make a backtrace in gdb
impossible.
2009-09-25 00:33:04 +02:00
Guus Sliepen
5dde6461a3 K&R style braces.
This is essentially commit f02d3ed3e1 from the
1.1 branch, making it easier to merge between master and 1.1.
2009-09-25 00:14:03 +02:00
Guus Sliepen
ab7c61b06f Update the address of the Free Software Foundation in all copyright headers. 2009-09-25 00:01:00 +02:00
Guus Sliepen
c217d214f4 Remove all occurences of $Id$. 2009-09-24 23:39:16 +02:00
Guus Sliepen
4bdf0e80ee Replace asprintf()s not covered by the merge to xasprintf(). 2009-09-16 20:28:30 +02:00
Guus Sliepen
075e6828a7 Merge branch 'master' into 1.1
Conflicts:
	have.h
	lib/dropin.c
	lib/fake-getaddrinfo.c
	lib/pidfile.c
	src/Makefile.am
	src/bsd/device.c
	src/conf.c
	src/connection.c
	src/connection.h
	src/graph.c
	src/mingw/device.c
	src/net.c
	src/net_setup.c
	src/node.c
	src/protocol_key.c
	src/protocol_misc.c
	src/tincd.c
2009-09-16 19:55:47 +02:00
Guus Sliepen
4bb3793e38 Raise default crypto algorithms to AES256 and SHA256.
In light of the recent improvements of attacks on SHA1, the default hash
algorithm in tinc is now SHA256. At the same time, the default symmetric
encryption algorithm has been changed to AES256.
2009-09-15 12:08:05 +02:00
Guus Sliepen
7242868b64 Allow PMTUDiscovery in switch and hub modes again.
PMTUDiscovery was disabled in commit d5b56bbba5
because tinc did not handle packets larger than the path MTU in switch and hub
modes. We now allow it again in preparation of proper support, but default to
off.
2009-09-12 13:40:32 +02:00
Guus Sliepen
73d77dd416 Replace asprintf() by xasprintf(). 2009-09-08 18:18:36 +02:00
Guus Sliepen
4124b9682f Handle truncated message authentication codes. 2009-06-06 19:04:04 +02:00
Guus Sliepen
5a132550de Merge branch 'master' into 1.1
Conflicts:
	doc/tincd.8.in
	lib/pidfile.c
	src/graph.c
	src/net.c
	src/net.h
	src/net_packet.c
	src/net_setup.c
	src/net_socket.c
	src/netutl.c
	src/node.c
	src/node.h
	src/protocol_auth.c
	src/protocol_key.c
	src/tincd.c
2009-06-05 23:14:13 +02:00
Guus Sliepen
e012e752f4 Fix initialisation of packet decryption context broken by commit 3308d13e7e.
Instead of a single, global decryption context, each node has its own context.
However, in send_ans_key(), the global context was initialised. This commit
fixes that and removes the global context completely.

Also only set status.validkey after all checks have been evaluated.
2009-05-24 19:31:31 +02:00
Michael Tokarev
218adee785 format 'not supported on this platform' error message
Format it in a similar way in all places, to make translation happier.
No functional changes.
2009-05-18 15:35:52 +02:00
Michael Tokarev
6698f7c390 Rename setup_network_connections() and split out try_outgoing_connections()
In preparation of chroot/setuid operations, split out call to
try_outgoing_connections() from setup_network_connections()
(which was the last call in setup_network_connections()).
This is because dropping privileges should be done in-between
setup_network_connections() and try_outgoing_connections().

This patch renames setup_network_connections() to setup_network()
and moves call to try_outgoing_connections() into main routine.

No functional changes.
2009-05-18 14:34:24 +02:00
Guus Sliepen
3308d13e7e Handle UDP packets from different and ports than advertised.
Previously, tinc used a fixed address and port for each node for UDP packet
exchange.  The port was the one advertised by that node as its listening port.
However, due to NAT the port might be different.  Now, tinc sends a different
session key to each node. This way, the sending node can be determined from
incoming packets by checking the MAC against all session keys. If a match is
found, the address and port for that node are updated.
2009-04-03 01:05:23 +02:00
Guus Sliepen
08aabbf931 Merge branch 'master' into 1.1
Conflicts:
	NEWS
	README
	doc/tinc.conf.5.in
	doc/tinc.texi
	po/nl.po
	src/conf.c
	src/connection.c
	src/event.c
	src/graph.c
	src/net.c
	src/net_packet.c
	src/net_socket.c
	src/node.c
	src/node.h
	src/openssl/rsagen.h
	src/protocol_auth.c
	src/protocol_key.c
	src/protocol_misc.c
	src/subnet.c
	src/subnet.h
	src/tincd.c
2009-03-09 19:02:24 +01:00
Guus Sliepen
43fa7283ac Use a simple Random Early Drop algorithm in send_tcppacket(). 2009-03-09 14:04:31 +01:00
Guus Sliepen
d5b56bbba5 Disable PMTUDiscovery in switch and hub modes.
In switch and hub modes, tinc does not generate ICMP packets in response to
packets that are larger than the path MTU.  However, if PMTUDiscovery is
enabled, the IP_MTU_DISCOVER and IPV6_MTU_DISCOVER option is set on the UDP
sockets, which causes all UDP packets to be sent with the DF bit set, causing
large packets to be dropped, even if they would otherwise be routed fine.
2009-03-09 13:48:54 +01:00
Guus Sliepen
78fc59e994 Update THANKS and copyright information. 2009-03-05 14:12:36 +01:00
Guus Sliepen
503c32eb0e Use a global list to track outgoing connections.
Previously an outgoing_t was maintained for each outgoing connection,
but the pointer to it was either stored in a connection_t or in an event_t.
This made it very hard to keep track of and to clean up.

Now a list is created when tinc starts and reads all the ConnectTo variables,
and which is recreated when tinc receives a HUP signal.
2009-01-20 13:12:41 +01:00
Guus Sliepen
a7e793c94e Add missing cleanup functions in close_network_connections(). 2009-01-19 23:17:28 +01:00
Guus Sliepen
a39a9506cd Move free()s at the end om main() to the proper destructor functions. 2009-01-09 12:36:06 +01:00
Guus Sliepen
0e4d419aae Enable PMTU discovery by default. 2008-12-22 20:35:45 +00:00
Guus Sliepen
046158a216 Use the crypto wrappers again instead of calling OpenSSL directly.
This theoretically allows other cryptographic libraries to be used,
and it improves the readability of the code.
2008-12-11 14:44:44 +00:00
Scott Lamb
40731d030f Temporarily revert to old crypto code
(The new code is still segfaulting for me, and I'd like to proceed with other
work.)

This largely rolls back to the revision 1545 state of the existing code
(new crypto layer is still there with no callers), though I reintroduced
the segfault fix of revision 1562.
2007-11-07 02:47:05 +00:00
Guus Sliepen
1b8f891836 Finish crypto wrapping. Also provide wrappers for OpenSSL.
Disable libgcrypt by default. Since it doesn't support the OFB cipher mode,
we can't use it in a backwards compatible way.
2007-05-23 13:45:49 +00:00
Guus Sliepen
465837dd7f Parse PEM RSA keys ourself, and use libgcrypt to do RSA encryption and decryption. 2007-05-20 22:28:49 +00:00
Guus Sliepen
bf8e3ce13d Remove pidfile in favour of control socket. 2007-05-19 14:13:21 +00:00
Guus Sliepen
01f47c46af Start of control socket implementation. 2007-05-18 16:52:34 +00:00
Guus Sliepen
fb0cfccf7d Use splay trees instead of AVL trees. 2007-05-18 10:05:26 +00:00
Guus Sliepen
f02d3ed3e1 K&R style braces 2007-05-18 10:00:00 +00:00
Guus Sliepen
ddc6a81a85 Remove global variable "now". 2007-05-18 09:34:06 +00:00
Guus Sliepen
7e1117197c Move key regeneration handling to net_setup.c. 2007-05-17 23:57:48 +00:00
Guus Sliepen
bf6490825e Remove legacy event system. 2007-05-17 22:13:12 +00:00
Guus Sliepen
d8dea8091f Properly delete listener socket events on shutdown. 2007-05-17 19:51:26 +00:00
Scott Lamb
38c25d62c2 Convert to libevent.
This is a quick initial conversion that doesn't yet show much advantage:
- We roll our own timeouts.
- We roll our own signal handling.
- We build up the meta connection fd events on each loop rather than
  on state changes.
2007-02-27 01:57:01 +00:00
Scott Lamb
834290b00f A couple missed tevent things.
(Sorry; had a couple changes queued.)
2007-02-27 01:30:57 +00:00
Scott Lamb
6362b12df7 Rename "event_t" to "tevent_t", along with associated functions.
This relieves some confusion and problems during the libevent transition.
In particular, "event_add" was defined by both.
(The 't' stands for 'timeout', 'tinc', 'temporary', or some such.)
2007-02-27 01:26:11 +00:00
Guus Sliepen
1bb5a284fe Make sure resolved addressed for outgoing connections are freed, if there are any. 2006-11-29 16:57:46 +00:00
Guus Sliepen
0714ac6c59 Nodes use events, so event system should be initialised first and destroyed last. 2006-11-11 22:44:15 +00:00
Guus Sliepen
1728d5b2c4 The "active" bit in node.status is not used. 2006-11-11 13:43:00 +00:00
Guus Sliepen
f88c9942e1 Use memcpy() to copy sockaddrs returned by getaddrinfo().
Thanks to Miles Nordin for spotting this.
2006-06-11 18:53:27 +00:00
Guus Sliepen
de78d79db8 Update copyright notices, remove Ivo's email address. 2006-04-26 13:52:58 +00:00
Guus Sliepen
af95368c0f Fix signedness compiler warnings. 2006-03-19 13:06:21 +00:00
Guus Sliepen
a90f1b652c Make sure $NAME is set correctly when executing tinc-down script. 2006-02-06 12:30:51 +00:00
Guus Sliepen
228e7a5c8f Apply patch from Scott Lamb adding an output buffer for the TCP sockets.
This helps coalescing multiple send_meta() commands into one TCP packet.
Also limit the size of the output buffer before dropping PACKETs.
2006-01-19 17:13:18 +00:00
Guus Sliepen
df3220a154 Update copyright notices. 2005-05-04 18:09:30 +00:00
Guus Sliepen
c46f56a8b8 subnet-up/down hooks 2004-12-01 20:06:05 +00:00
Guus Sliepen
4fe7aff4d1 Add BlockingTCP option, useful when using TCPOnly on slow or congested links. 2004-11-10 21:56:31 +00:00
Guus Sliepen
7926a156e5 Update copyrights, links, email addresses and let Subversion update $Id$ keywords. 2004-03-21 14:21:22 +00:00
Guus Sliepen
af86a3226e Revert Martin Kihlgren's patch, it doesn't work the way it should. 2004-03-20 22:23:42 +00:00
Guus Sliepen
56aad1bb48 Applied Martin Kihlgren's IdentityGenerosity patch,
simplified and renamed to StrictSource.
2004-03-20 15:28:55 +00:00
Guus Sliepen
a92c471a2b Only read our public key if it wasn't already in the private key file. 2004-03-15 18:15:02 +00:00
Guus Sliepen
6d41b429a2 Better name, show probed MTU in dump. 2003-12-20 21:25:17 +00:00
Guus Sliepen
9bab08e972 More sensible name, and try to set PMTU discovery on IPv6 sockets as well. 2003-12-20 21:09:33 +00:00